#include <stdio.h>
#include <limits.h> 

int main()
{
	unsigned int nbbits = sizeof (unsigned int)*CHAR_BIT;	
	unsigned int a = 20;
	unsigned int valbit;
	unsigned int masque = 1; 
	printf ("Un unsigned int est code sur %u bits. \n", nbbits);
	return 0;
}
